./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:37:15,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:37:15,376 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:37:15,380 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:37:15,382 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:37:15,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:37:15,416 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:37:15,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:37:15,417 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:37:15,419 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:37:15,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:37:15,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:37:15,421 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:37:15,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:37:15,423 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:37:15,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:37:15,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:37:15,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:37:15,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:37:15,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:37:15,425 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:37:15,426 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:37:15,426 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:37:15,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:37:15,427 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:37:15,427 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:37:15,428 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:37:15,428 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:37:15,428 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:37:15,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:37:15,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:37:15,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:37:15,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:37:15,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:37:15,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:37:15,430 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:37:15,430 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:37:15,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:37:15,430 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:37:15,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:37:15,431 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:37:15,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:37:15,431 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2024-11-20 17:37:15,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:37:15,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:37:15,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:37:15,712 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:37:15,712 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:37:15,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i [2024-11-20 17:37:17,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:37:17,487 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:37:17,488 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i [2024-11-20 17:37:17,508 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b04ad476/ea0644fd98874d92b9ad36bf197b796b/FLAGdc5d8f0c3 [2024-11-20 17:37:17,524 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b04ad476/ea0644fd98874d92b9ad36bf197b796b [2024-11-20 17:37:17,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:37:17,528 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:37:17,531 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:37:17,531 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:37:17,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:37:17,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:37:17" (1/1) ... [2024-11-20 17:37:17,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475b6d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:17, skipping insertion in model container [2024-11-20 17:37:17,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:37:17" (1/1) ... [2024-11-20 17:37:17,589 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:37:18,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:37:18,401 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:37:18,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:37:18,585 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:37:18,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18 WrapperNode [2024-11-20 17:37:18,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:37:18,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:37:18,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:37:18,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:37:18,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:18,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:18,764 INFO L138 Inliner]: procedures = 280, calls = 1603, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1780 [2024-11-20 17:37:18,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:37:18,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:37:18,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:37:18,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:37:18,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:18,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:18,801 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:18,861 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 5, 259, 14, 5, 1280, 2, 2]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 5, 256, 0, 5, 1280, 0, 0]. The 11 writes are split as follows [0, 0, 1, 8, 0, 0, 1, 1]. [2024-11-20 17:37:18,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:18,861 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:19,062 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:19,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:19,104 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:19,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:19,157 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:37:19,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:37:19,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:37:19,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:37:19,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (1/1) ... [2024-11-20 17:37:19,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:37:19,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:37:19,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:37:19,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:37:19,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 17:37:19,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-20 17:37:19,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-20 17:37:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-20 17:37:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-20 17:37:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-20 17:37:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-20 17:37:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-20 17:37:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-11-20 17:37:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-20 17:37:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-20 17:37:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 17:37:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-20 17:37:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-20 17:37:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-20 17:37:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-20 17:37:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-20 17:37:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-20 17:37:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-20 17:37:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-11-20 17:37:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-20 17:37:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-20 17:37:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-20 17:37:19,294 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-20 17:37:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:37:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:37:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:37:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-20 17:37:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-20 17:37:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-20 17:37:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-20 17:37:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-20 17:37:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-20 17:37:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:37:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:37:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-20 17:37:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-20 17:37:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-20 17:37:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-20 17:37:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-20 17:37:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-20 17:37:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-20 17:37:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-11-20 17:37:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-20 17:37:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:37:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:37:19,301 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:37:19,533 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:37:19,535 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:37:21,484 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:37:21,484 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:38:01,084 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:38:01,084 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-20 17:38:01,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:38:01 BoogieIcfgContainer [2024-11-20 17:38:01,085 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:38:01,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:38:01,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:38:01,090 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:38:01,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:37:17" (1/3) ... [2024-11-20 17:38:01,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea5d394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:38:01, skipping insertion in model container [2024-11-20 17:38:01,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:37:18" (2/3) ... [2024-11-20 17:38:01,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea5d394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:38:01, skipping insertion in model container [2024-11-20 17:38:01,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:38:01" (3/3) ... [2024-11-20 17:38:01,093 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree-deref.i [2024-11-20 17:38:01,111 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:38:01,111 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-11-20 17:38:01,111 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:38:01,245 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-20 17:38:01,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2024-11-20 17:38:01,457 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2024-11-20 17:38:01,458 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-20 17:38:01,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1514 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2024-11-20 17:38:01,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2024-11-20 17:38:01,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2024-11-20 17:38:01,484 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:38:01,491 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c7f358b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:38:01,491 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-11-20 17:38:01,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:38:01,558 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-20 17:38:01,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:38:01,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:01,560 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:38:01,561 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:01,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash 3699657, now seen corresponding path program 1 times [2024-11-20 17:38:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:01,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121304128] [2024-11-20 17:38:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:02,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:02,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121304128] [2024-11-20 17:38:02,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121304128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:38:02,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:38:02,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:38:02,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609946629] [2024-11-20 17:38:02,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:38:02,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:38:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:38:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:38:02,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2024-11-20 17:38:02,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:02,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:02,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2024-11-20 17:38:02,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:04,091 INFO L124 PetriNetUnfolderBase]: 3268/7594 cut-off events. [2024-11-20 17:38:04,092 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-20 17:38:04,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 7594 events. 3268/7594 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61713 event pairs, 3059 based on Foata normal form. 520/6970 useless extension candidates. Maximal degree in co-relation 11382. Up to 5189 conditions per place. [2024-11-20 17:38:04,155 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2024-11-20 17:38:04,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2024-11-20 17:38:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:38:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:38:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-11-20 17:38:04,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2024-11-20 17:38:04,171 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2024-11-20 17:38:04,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2024-11-20 17:38:04,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:38:04,182 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2024-11-20 17:38:04,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2024-11-20 17:38:04,188 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-11-20 17:38:04,189 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2024-11-20 17:38:04,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:04,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:04,189 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:38:04,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:38:04,190 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:04,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:04,191 INFO L85 PathProgramCache]: Analyzing trace with hash 3699658, now seen corresponding path program 1 times [2024-11-20 17:38:04,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:04,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071919229] [2024-11-20 17:38:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:04,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071919229] [2024-11-20 17:38:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071919229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:38:05,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:38:05,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:38:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128216395] [2024-11-20 17:38:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:38:05,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:38:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:38:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:38:05,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2024-11-20 17:38:05,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:05,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:05,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2024-11-20 17:38:05,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:06,294 INFO L124 PetriNetUnfolderBase]: 3268/7592 cut-off events. [2024-11-20 17:38:06,294 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-11-20 17:38:06,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 7592 events. 3268/7592 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61770 event pairs, 3059 based on Foata normal form. 2/6451 useless extension candidates. Maximal degree in co-relation 12870. Up to 5189 conditions per place. [2024-11-20 17:38:06,357 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-11-20 17:38:06,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2024-11-20 17:38:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:38:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:38:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-20 17:38:06,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-20 17:38:06,359 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2024-11-20 17:38:06,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2024-11-20 17:38:06,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:38:06,366 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2024-11-20 17:38:06,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2024-11-20 17:38:06,367 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-11-20 17:38:06,368 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2024-11-20 17:38:06,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:06,368 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:06,368 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:38:06,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:38:06,369 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:06,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash 114695531, now seen corresponding path program 1 times [2024-11-20 17:38:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:06,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944386222] [2024-11-20 17:38:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944386222] [2024-11-20 17:38:06,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944386222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:38:06,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:38:06,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:38:06,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846534478] [2024-11-20 17:38:06,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:38:06,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:38:06,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:38:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:38:06,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-11-20 17:38:06,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:06,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:06,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-11-20 17:38:06,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:07,718 INFO L124 PetriNetUnfolderBase]: 3268/7598 cut-off events. [2024-11-20 17:38:07,719 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-20 17:38:07,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12897 conditions, 7598 events. 3268/7598 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61757 event pairs, 3059 based on Foata normal form. 1/6455 useless extension candidates. Maximal degree in co-relation 12872. Up to 5190 conditions per place. [2024-11-20 17:38:07,767 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-11-20 17:38:07,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2024-11-20 17:38:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:38:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:38:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-11-20 17:38:07,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-11-20 17:38:07,771 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2024-11-20 17:38:07,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2024-11-20 17:38:07,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:38:07,780 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2024-11-20 17:38:07,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2024-11-20 17:38:07,782 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2024-11-20 17:38:07,782 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2024-11-20 17:38:07,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:07,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:07,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:38:07,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:38:07,784 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:07,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:07,785 INFO L85 PathProgramCache]: Analyzing trace with hash -739479200, now seen corresponding path program 1 times [2024-11-20 17:38:07,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:07,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132846416] [2024-11-20 17:38:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:07,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:08,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:08,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132846416] [2024-11-20 17:38:08,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132846416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:38:08,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:38:08,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:38:08,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163411293] [2024-11-20 17:38:08,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:38:08,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:38:08,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:08,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:38:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:38:08,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-20 17:38:08,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:08,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:08,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-20 17:38:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:09,694 INFO L124 PetriNetUnfolderBase]: 4054/9541 cut-off events. [2024-11-20 17:38:09,694 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-20 17:38:09,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16298 conditions, 9541 events. 4054/9541 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83658 event pairs, 2177 based on Foata normal form. 2/8050 useless extension candidates. Maximal degree in co-relation 16278. Up to 3712 conditions per place. [2024-11-20 17:38:09,747 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2024-11-20 17:38:09,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2024-11-20 17:38:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:38:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:38:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2024-11-20 17:38:09,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2024-11-20 17:38:09,749 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2024-11-20 17:38:09,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2024-11-20 17:38:09,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:38:09,754 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2024-11-20 17:38:09,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2024-11-20 17:38:09,755 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2024-11-20 17:38:09,755 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2024-11-20 17:38:09,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:09,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:09,756 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:38:09,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:38:09,756 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:09,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash -739479199, now seen corresponding path program 1 times [2024-11-20 17:38:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:09,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225978495] [2024-11-20 17:38:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225978495] [2024-11-20 17:38:10,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225978495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:38:10,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:38:10,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:38:10,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791780614] [2024-11-20 17:38:10,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:38:10,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:38:10,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:38:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:38:10,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-20 17:38:10,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:10,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:10,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-20 17:38:10,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:11,629 INFO L124 PetriNetUnfolderBase]: 4084/9802 cut-off events. [2024-11-20 17:38:11,629 INFO L125 PetriNetUnfolderBase]: For 1608/1608 co-relation queries the response was YES. [2024-11-20 17:38:11,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17694 conditions, 9802 events. 4084/9802 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85882 event pairs, 3767 based on Foata normal form. 1/8406 useless extension candidates. Maximal degree in co-relation 17660. Up to 6645 conditions per place. [2024-11-20 17:38:11,696 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2024-11-20 17:38:11,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2024-11-20 17:38:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:38:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:38:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2024-11-20 17:38:11,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2024-11-20 17:38:11,698 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2024-11-20 17:38:11,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2024-11-20 17:38:11,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:38:11,705 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2024-11-20 17:38:11,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2024-11-20 17:38:11,706 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2024-11-20 17:38:11,706 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2024-11-20 17:38:11,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:11,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:11,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:38:11,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:38:11,707 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:11,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -933832169, now seen corresponding path program 1 times [2024-11-20 17:38:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:11,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492646397] [2024-11-20 17:38:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:11,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:12,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:12,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492646397] [2024-11-20 17:38:12,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492646397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:38:12,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321314084] [2024-11-20 17:38:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:12,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:38:12,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:38:12,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:38:12,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:38:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:12,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 3752 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-20 17:38:12,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:38:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:12,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:38:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:12,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321314084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:38:12,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:38:12,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-20 17:38:12,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783053845] [2024-11-20 17:38:12,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:38:12,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:38:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:38:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:38:12,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-11-20 17:38:12,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:12,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:12,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-11-20 17:38:12,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:13,513 INFO L124 PetriNetUnfolderBase]: 3973/9582 cut-off events. [2024-11-20 17:38:13,513 INFO L125 PetriNetUnfolderBase]: For 955/1013 co-relation queries the response was YES. [2024-11-20 17:38:13,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 9582 events. 3973/9582 cut-off events. For 955/1013 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83707 event pairs, 3660 based on Foata normal form. 3/8202 useless extension candidates. Maximal degree in co-relation 17132. Up to 6451 conditions per place. [2024-11-20 17:38:13,571 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2024-11-20 17:38:13,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2024-11-20 17:38:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:38:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:38:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2024-11-20 17:38:13,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2024-11-20 17:38:13,574 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2024-11-20 17:38:13,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2024-11-20 17:38:13,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:38:13,580 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2024-11-20 17:38:13,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2024-11-20 17:38:13,582 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2024-11-20 17:38:13,582 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2024-11-20 17:38:13,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:13,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:13,583 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-20 17:38:13,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:38:13,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 17:38:13,784 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:13,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1115900469, now seen corresponding path program 1 times [2024-11-20 17:38:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796476144] [2024-11-20 17:38:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:14,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:14,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796476144] [2024-11-20 17:38:14,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796476144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:38:14,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815709187] [2024-11-20 17:38:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:14,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:38:14,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:38:14,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:38:14,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:38:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:15,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 3789 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:38:15,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:38:15,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:38:15,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:38:15,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:38:15,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:38:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:15,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:38:15,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:38:15,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-20 17:38:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:16,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815709187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:38:16,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:38:16,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-20 17:38:16,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716884288] [2024-11-20 17:38:16,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:38:16,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:38:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:38:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:38:17,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-20 17:38:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:17,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:17,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-20 17:38:17,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:18,497 INFO L124 PetriNetUnfolderBase]: 4084/9814 cut-off events. [2024-11-20 17:38:18,497 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2024-11-20 17:38:18,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17744 conditions, 9814 events. 4084/9814 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85901 event pairs, 3767 based on Foata normal form. 3/8420 useless extension candidates. Maximal degree in co-relation 17711. Up to 6645 conditions per place. [2024-11-20 17:38:18,552 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 70 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-11-20 17:38:18,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 532 flow [2024-11-20 17:38:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:38:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:38:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 484 transitions. [2024-11-20 17:38:18,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-11-20 17:38:18,554 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 6 states and 484 transitions. [2024-11-20 17:38:18,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 532 flow [2024-11-20 17:38:18,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-20 17:38:18,559 INFO L231 Difference]: Finished difference. Result has 147 places, 132 transitions, 376 flow [2024-11-20 17:38:18,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=147, PETRI_TRANSITIONS=132} [2024-11-20 17:38:18,560 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 18 predicate places. [2024-11-20 17:38:18,560 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 132 transitions, 376 flow [2024-11-20 17:38:18,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:18,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:18,561 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-11-20 17:38:18,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:38:18,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-20 17:38:18,765 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:18,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1205849115, now seen corresponding path program 2 times [2024-11-20 17:38:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:18,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896932903] [2024-11-20 17:38:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 17:38:19,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:19,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896932903] [2024-11-20 17:38:19,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896932903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:38:19,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:38:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:38:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269761511] [2024-11-20 17:38:19,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:38:19,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:38:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:38:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:38:19,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-20 17:38:19,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 132 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:19,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:19,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-20 17:38:19,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:20,015 INFO L124 PetriNetUnfolderBase]: 4432/10447 cut-off events. [2024-11-20 17:38:20,015 INFO L125 PetriNetUnfolderBase]: For 929/929 co-relation queries the response was YES. [2024-11-20 17:38:20,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18912 conditions, 10447 events. 4432/10447 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 93460 event pairs, 2895 based on Foata normal form. 0/8958 useless extension candidates. Maximal degree in co-relation 18872. Up to 4460 conditions per place. [2024-11-20 17:38:20,082 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 101 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-11-20 17:38:20,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 166 transitions, 654 flow [2024-11-20 17:38:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:38:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:38:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2024-11-20 17:38:20,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2024-11-20 17:38:20,084 INFO L175 Difference]: Start difference. First operand has 147 places, 132 transitions, 376 flow. Second operand 3 states and 302 transitions. [2024-11-20 17:38:20,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 166 transitions, 654 flow [2024-11-20 17:38:20,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 166 transitions, 646 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:38:20,093 INFO L231 Difference]: Finished difference. Result has 143 places, 130 transitions, 368 flow [2024-11-20 17:38:20,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=143, PETRI_TRANSITIONS=130} [2024-11-20 17:38:20,095 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 14 predicate places. [2024-11-20 17:38:20,096 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 130 transitions, 368 flow [2024-11-20 17:38:20,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:20,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:20,096 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-11-20 17:38:20,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:38:20,096 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:20,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1205849116, now seen corresponding path program 1 times [2024-11-20 17:38:20,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:20,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527745432] [2024-11-20 17:38:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:20,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:20,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527745432] [2024-11-20 17:38:20,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527745432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:38:20,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910389293] [2024-11-20 17:38:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:20,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:38:20,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:38:20,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:38:20,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:38:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:21,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 3977 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:38:21,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:38:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:21,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:38:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:21,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910389293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:38:21,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:38:21,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-20 17:38:21,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812259775] [2024-11-20 17:38:21,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:38:21,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:38:21,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:38:21,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:38:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:38:21,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-11-20 17:38:21,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 130 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:21,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:38:21,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-11-20 17:38:21,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:38:22,318 INFO L124 PetriNetUnfolderBase]: 3973/9593 cut-off events. [2024-11-20 17:38:22,319 INFO L125 PetriNetUnfolderBase]: For 1582/1640 co-relation queries the response was YES. [2024-11-20 17:38:22,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17531 conditions, 9593 events. 3973/9593 cut-off events. For 1582/1640 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83495 event pairs, 3660 based on Foata normal form. 6/8232 useless extension candidates. Maximal degree in co-relation 17468. Up to 6451 conditions per place. [2024-11-20 17:38:22,373 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 76 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-11-20 17:38:22,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 153 transitions, 650 flow [2024-11-20 17:38:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:38:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:38:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 956 transitions. [2024-11-20 17:38:22,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2024-11-20 17:38:22,376 INFO L175 Difference]: Start difference. First operand has 143 places, 130 transitions, 368 flow. Second operand 12 states and 956 transitions. [2024-11-20 17:38:22,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 153 transitions, 650 flow [2024-11-20 17:38:22,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 153 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:38:22,382 INFO L231 Difference]: Finished difference. Result has 159 places, 136 transitions, 464 flow [2024-11-20 17:38:22,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=464, PETRI_PLACES=159, PETRI_TRANSITIONS=136} [2024-11-20 17:38:22,383 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 30 predicate places. [2024-11-20 17:38:22,383 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 136 transitions, 464 flow [2024-11-20 17:38:22,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:38:22,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:38:22,384 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2024-11-20 17:38:22,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:38:22,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:38:22,585 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-20 17:38:22,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:38:22,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1273456463, now seen corresponding path program 2 times [2024-11-20 17:38:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:38:22,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624917237] [2024-11-20 17:38:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:38:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:38:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:38:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:38:24,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:38:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624917237] [2024-11-20 17:38:24,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624917237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:38:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534863051] [2024-11-20 17:38:24,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:38:24,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:38:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:38:24,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:38:24,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:38:25,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:38:25,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat